html,body{
    width: 100%;
    height: 100%;
    background: #fff;
    -webkit-app-region: drag
}

ul,li {
    padding: 0;
    margin: 0;
    list-style: none;
}

.content {
    float: left;
    width: calc(100% - 200px);
    margin-left: 200px;
    margin-top: 50px;
}
a {
    text-decoration: none;
}
